Do not update the run if the todo set is empty for the current node.

[tatoo.git] / src / run.ml

diff --git a/src/run.ml b/src/run.ml
index d7f4ba7..fb13084 100644 (file)
--- a/src/run.ml
+++ b/src/run.ml
@@ -334,31 +334,36 @@ DEFINE AND_(t1,t2) =
         let fcs = unsafe_get_status status fc_id in
         let nss = unsafe_get_status status ns_id in
         (* evaluate the transitions with all this statuses *)
-        let status1 = eval_trans auto cache2 cache5 tag fcs nss ps status0 in
-        TRACE(html tree node _i status1 "Updating transitions");
-
-        (* update the cache if the status of the node changed *)
-
-        if status1 != status0 then status.(node_id) <- status1;
+        let status1 = if status0.NodeStatus.node.todo == StateSet.empty then status0 else begin
+          let status1 = eval_trans auto cache2 cache5 tag fcs nss ps status0 in
+          TRACE(html tree node _i status1 "Updating transitions");
+          (* update the cache if the status of the node changed *)
+          if status1 != status0 then status.(node_id) <- status1;
+          status1
+        end
+        in
         (* recursively traverse the first child *)
         let unstable_left = loop fc in
         (* here we re-enter the node from its first child,
            get the new status of the first child *)
         let fcs1 = unsafe_get_status status fc_id in
         (* update the status *)
-        let status2 = eval_trans auto cache2 cache5 tag fcs1 nss ps status1 in
-
-        TRACE(html tree node _i status2 "Updating transitions (after first-child)");
-
-        if status2 != status1 then status.(node_id) <- status2;
+        let status2 = if status1.NodeStatus.node.todo == StateSet.empty then status1 else begin
+          let status2 = eval_trans auto cache2 cache5 tag fcs1 nss ps status1 in
+          TRACE(html tree node _i status2 "Updating transitions (after first-child)");
+          if status2 != status1 then status.(node_id) <- status2;
+          status2
+        end
+        in
         let unstable_right = loop ns in
         let nss1 = unsafe_get_status status ns_id in
-        let status3 = eval_trans auto cache2 cache5 tag fcs1 nss1 ps status2 in
-
-        TRACE(html tree node _i status3 "Updating transitions (after next-sibling)");
-
-        if status3 != status2 then status.(node_id) <- status3;
-
+        let status3 = if status2.NodeStatus.node.todo == StateSet.empty then status2 else begin
+          let status3 = eval_trans auto cache2 cache5 tag fcs1 nss1 ps status2 in
+          TRACE(html tree node _i status3 "Updating transitions (after next-sibling)");
+          if status3 != status2 then status.(node_id) <- status3;
+          status3
+        end
+        in
         let unstable_self =
           (* if either our left or right child is unstable or if we still have transitions
              pending, the current node is unstable *)